Lecture Objectives

Lecture 26 Objectives

At the end of today's class you should

KNOW:

how the stack is managed on the 8086
how to use the PUSH and POP instructions
how to define and call a subroutine in an 8086 assembly language program

BE ABLE TO:

define, call, and return from a subroutine in 8086 assembly language

Sample Exam Question:

Draw a picture of the stack in an 8086 assembly language program as it would appear after the following code executes:

   MOV  AX, 25
   PUSH AX
   MOV  AX, 50
   PUSH AX
   CALL MySub

In your picture, indicate the relative positions in memory of the stack segment (SS) and stack pointer (SP) values, as well as the contents of each known location on the stack.